Shedding mechanism for looms.



A. A. GORDON, Jn. SHEDDING MEOHANISM FOR LOOMS.

PPLIOATION FILED :11.11.17, 1906.

954, 1 81 4Pausented Apr. 5, 1910.

2 SHBETB--EHBBT 1.

A. A. GORDON, JR. SHEDDING MEGHANISM FOB LOOMS.

APPLICATION FILED JAN. 17, 1906. Patented Apr- 5 2 SHEETS-SHEET 2.

Emea/wo@ UNITED STATES! 'PATENT OFFICE.

ALBERT A'. GORDON, JR., OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

SHEDDING MECHANISM FOR LOOIVIS.

Specification of Letters Patent.

atented Apr. 5, 1910.

Application filed January 17, 1906. Serial No. 296,466.

To all whom it may concern:

Be it known that I, ALmnrr A. GORDON, Jr., a citizen of the United States, residing at iVorccstcr, inthe county of iVorcester and State vof Massachusetts, have invented certain new and useful Iniprovements in Shedding Mechanism for Looms, of which the following is a specification.

My invention relates to shedding mechanism for looms, and particularly to a dobby of that class in which two pattern cylinders, having a rotary movement in a fixed plane, with pattern chains thereon, are adapted to be operated successively, one during` the weaving of the plain portion of the fabric, and the other during the weaving of a border or end, as in the case of towels.

The object of my invention is to improve upon the construction of a dobby of the class referred to7 and more particularly of the dobby shown and described in U. S. Letters Patent, No. (303,308. In the dobby shown and described in said patent, there are two pattern cylinders, cach carrying a separate chain of single index type, and there is only one set of indicating levers for both cylinders, each lever having two selecting surfaces thereon, so-termed, one for one pattern chain, and the other for the other pattern chain. The pattern chains on both cylinders act upon the same set of indieating levers, and when one cylinder is stopped, the other cylinder works, and vice versa. In order to prevent the action of a pattern pin on the non-working cylinder, on the selecting surface of the indicating lever therefor, said cylinder must always be stopped, so that the selecting surface is between two pins on the bars of the pattern chain, as set out in said patent.

In my improvements in a dobby with two cylinders, of the class referred to, I provide, instead of one set of indicating levers for the two cylinders, two sets of indicating levers, one setI for each cylinder, that is, each cylinder has its own set oit' ind icating levers upon which the chain on said cylinder acts.- To move one set of indicating levers out of operative position, or out of a position in which they would be acted on by the pattern surfaces of their operating cylinder, I employ in this instance a swinging rod or bar, adapted to be automatically moved into a position to engage one set of indicating` levers, to raise said levers and cause their engaging portions to be moved away from the pattern chain which operates the same, and at the same time to disengage said rod or bar from the other set of indicating` levers, to allow said levers to move into operative position, and to be engaged by the pattern surfaces on their operating pattern chain, and vice versa. l

I have only shown in thc drawings detached portions of a dobby of the class referred to, and lmrtieularly shown in said patent, ilo. (308.308, with my improvenieuts combined therewith, sufficient to enable those skilled in the art to understand the construction and operation thereof.

Referring to the drawings z-Figure l is a side view of portions of a dobby, and my improvenunts combined therewith. Fig. '2 is a plan view of the pattern cylinder driving mechanisn'i, detached, shown in Fig. l, looking in the direction of arrow o, same ligure. Fig. 3 is a diagramnuitic sectional view, showing the arrangement of the two .sets o t indicating levers, and the two pattern c vlimlcrs. Fig. 4 corresponds to Fig. 3, but shows the opposite position of some of the parts, and also shows a sectional view of the supplemental guide and support for the chain on one of the cylinders, taken at a point iiuilicated by line t, 4, Fig. 5, looking in the direction of arrow Z), same ligure. Fig. 5 is a central vertical sectional view of the pattern cylinder, shown at the right in Fig. lt. and also shows in full lines a side view of the sulnilemcntal guide or support, looking in the direction of arrow c. Fig. 1, and also shows the stand therefor, not shown in Fig. il, and, Fig. is a diagrammatie transverse sectional view through an upper and lower hook for the lifter bars, and through the engaging' ends of two contiguous indicating levers, and also shows the operating wire, intermediate .said two hooks, in full lines.

In the accompanying drawings, 1 is one of the end or side frames of a dobby, which with the other end or side frame. not shown, support the several parts of the dobby in the usual way.

The frame l has the horizontal slots l. therein for the lifter bars 2, and Q, which are adjustably connected by rods 3 and 3', with the rocking lever 4 fast on a rock shaft 5. G is a harness lever or jack, pivotally mounted at its lower end on a rod 6', and

each of which is fast on a shaft 11, and 12,

said shafts being mounted in suitable bearings on stands 11' and 12', see Fig. 1, se-

cured to the end frame 1 of the dobby and having a rotary movement in a fixed plane. The rotary movement of the shafts 11 and 12, on which the pattern cylinders 9 and 10 are fast in a fixed plane, causes the pattern cylinders 9 and 10 also to have a rotary movement in a lixed plane, and it is only necessary to have mechanism for communicating rotary movement to the shafts 11 and 12, and the pattern cylinders 9 and 10 fast thereon, and no mechanism is required for raising or moving the pattern cylinders, and with said cylinders the heavy pattern chains supported thereon. On the shafts 11 and 12 are loosely mounted the worm gears 13, and 14, which in this instance are clutched to their respective shafts, to cause said shaft and the pattern cylinder to revolve with them, by a sliding clutch member 15, or 16, splined on the shafts, and adapted to clutch the worm gears 13, and 14 thereto, in the manner fully set out in said patent, No. 603,308.

Rotary motion is communicated to the worm gears 13, and 14, to cause them to rotate in the same direction, through a worm 17, see Fig. 1, fast on an upright driven shaft 18. The worm 17 has two independent worm thread portions 17 and 17" thereon, one 17 for operating one worm gear 13, and the other 17" for operating the other worm gear 14.

The two clutch members 15, and 16, are moved on the shafts 11, and 12, to cause one pattern cylinder, or the other, to rotate at a predetermined time, and for a predetermined interval, according to the indications of a pattern surface, not shown, through a rocking lever 20, centrally pivoted on a stud 21 secured in the outer end of a stand or bracket 22, which is secured at its inner end to the end frame 1, see Fig. 2.

The rocking lever 20 has on each end a pin 20', which is adapted to enter an annular groove 15' and 16' in the clutch members 15, and 16. The rocking lever 20 has in this instance an open end slot 20" at its central portion, to receive a lever, not shown, connected with pattern mechanism, not shown, for communicating a rocking motion to said lever 20. The rocking lever 20 has an inwardly extending arm 20"' thereon, on the inner end of which is in this instance a stud 20"", which is pivotally connected with the inner end of a connector 23. The outer end of the connector 23 has a bifurcated or yoke shaped end 23', adjustable thereon, which is pivotally connected with an arm 24 on a hub 25, which is adjustably mounted, by a set screw 25', on the journal 26 of an arm 26, to rock in suitable bearings on the end frame 1, see Fig. 2. On the outer end of the arm 26 is attached, or made integral therewith, one end of a rod 27, which extends transversely through the dobby, under the outer ends of the two sets of pattern indicating levers 28, and 29, and in a position to move into engagement with downwardly projecting inclined or cam shaped surfaces 28', on one set of indicating levers 28, to raise the outer ends of said levers, as shown in Fig. 4, or into engagement with downwardly extending inclined or cam shaped projections 29 on the other set of indicating levers 29, to raise said levers, as shown in Fig. 5.

The two sets of pattern indicating levers 28 and 29 are pivotally mounted on a rod 30, which extends transversely through the dobby and is supported at each end in the end frames of the dobby. The outer ends of the pattern indicating levers 28 and 29 are supported on and guided by a transversely extending comb 31, see Fig. 1, in the usual way.

One set of pattern indicating levers, as 29, extend over the outer pattern cylinder 10, which has thereon a pattern chain 32, made up of bars linked together, and carrying pattern pins 32', forming a single index chain, in the usual way.

In the rotation of the pattern cylinder 10, and the pattern chain 32 thereon, if a pattern pin 32 comes under a lever 29, it raises said lever, and causes the upwardly projecting end 29 thereon to be lowered, and through the operating wire 33, see Fig. 6, having a bend 33' therein at its lower end, to extend over the upwardly projecting end 29" of the lever 29 and under the lower hook 8, and a loop 33" at its upper end to extend under the upper hook 8, lowers the two hooks 8 into a position where they will be engaged by the reciprocating lifter bars 2, and 2.

Vhen in the rotation of the pattern cylinder 10 no pattern pin 32' comes under the pattern indicating lever 29, as shown in Fig. 4, then the pattern indicating lever drops down at its outer end, as shown in said Fig. 4, and the upward movement of the projecting end 29" raises the operating wire 33, and with it the two hooks 8, to cause them to extend in a plane above the lifter bars 2, and 2', so as not to be engaged by said lifter bars, as shown in Fig. 4. The other set of pattern indicating levers 28y have on their inner ends a downwardly extending portion 28, which in its operative position is adapted to engage the pattern chain 32 on the pattern cylinder 9, see Fig. 3. The pattern indicating lever 28 has an engaging end 28 for the operating wire 33, in a plane below the engaging end 29 of the lever 29, and is adapted to engage the lower end of the o erating wire 33, to raise or lower the hooks 8, independently of the movement of the'indicating lever 29.

Vhen the set of indicating levers 28 are in an operative position, to be acted on by their pattern chain 32 on the pattern cylinder 10, the other pattern indicating levers 2E) will be held in their inoperative position by the transverse rod 27, as shown in Fig. 3, and when the pattern indicating levers 2S) are in their operative position, to be engaged by the chain 32 on the pattern cylinder l), the other set of levers 28 will be held in their inoperative position b v the transverse rod 27, as shown in Fig. 4t.

The operation of my improvements will be readily understood by those skilled in the art, and briefly is as follows: In Fig. l, the pattern cylinder 10, carrying the pattern chain 32, is shown as operating on one set of indicating levers 29, the other set of levers 28 being held out of operative position by the transverse rod 27. The pattern cylinder 10 .is rotated, through the rotation of the worm gear 14, clutched to the shaft 12 of the pattern cylinder, as shown in Fig. 2; said worm gear 141 is rotated by the worm 17 on the driven shaft 18. The worm gear 13 on the shaft 11 of the pattern cylinder S), will run loose, leaving the shaft 11 and pattern cylinder S) at rest. After the desired amount of fabric has been woven from the pattern chain 32, through the rotation of the cylinder 10, the pattern indicating mechanism, not shown, operates to move the lever 20, shown in Fig. 2, to rock said lever and move it into the opposite position, and unclutch the worm gear 14 from the shaft 12, leaving said shaft, and the pattern cylinder 10 and the chain 32 thereon, at rest, and clutch the worm gear 13 to the shaft 11, and cause said shaft, and the pattern cylinder S) and the chain 32 thereon, to rotate. The movement of the lever 20 causes, through link 23 and connections to the transverse rod 27, a simultaneous movement of said rod 27, to cause it to move, from the position shown in F ll, to the position shown in Fig. 3, and this movement ofthe rod 27 moves the set of pattern indicating levers 29 into their inoperative position, and allows the set of pattern indicating levers 2S to move into their operative position, shown in Fig. 3. i'\fter the desired amount of fabric has been woven from the chain 32 on the pattern cylinder 9, the lever 20 is again moved, to throw out of operation said pattern chain 32 on the cylinder 9, and put into operation the pattern chain 32 on the cylinder l0, and the levers 28 are simultaneously moved into an inoperative. position, as shown in Fig. 4, and the levers 2f) are allowed to drop into an operative position; this operation is repeated, according to the indications of the pattern mechanism which control the movement of the rocking lever 20.

It. will be seen that my improvements will permit of a pattern of any two weaves being woven, with a minimum amount of chain, one weave not being in any way dependent on the other, or on the number of picks in its pattern.

I have shown in Figs. 4t and 5 a supplemental attachment, forming a pattern chain support and guide, to be used for a long pattern chain shown in Fig. 4. By means of my supplemental support and guide, the chain is looped at its central portion, and the uppermost bar of the loop extends into one of the longitudinal recesses in the pattern cylinder, so that the revolution of the pattern cylinder will cause the movement of the loop of the chain over my support and guide. 'lhe support and guide in this instance consists of a rounded or curved shaped device 3i. secured to the bracket. 12', carrying in this instance the bearing for the pattern cylinder shaft '12, see Fig. 5. 'lhe device 3-it is connected b v a bar 3l cxtend ing transversely through the loop of the chain, with a similar device at the opposite end of the dobby, not shown.

The device 31 is preferably located directly below the pattern cylinder, as shown in Fig. 5, so that the extreme end only of the pattern bars, where there are no pattern pins, will pass over the support and guide 34. The uppern'lost bar of the loop extending within a longitudinal recess in the pattern cylinder, and held there by the support 3st, will cause a positive movement of thc loop of the chain with the rest of the chain, as the cylinder rotates.

It will be understood that the details of my improvements may be varied if desired, and they may l l adapted to be used in connection with any construction of dobby.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a dobby, the combination with two pattern surfaces having a rotary movement in a` lixed plane, of two sets of pattern indicating levers, one set for each pattern surface, and means for moving each set of levers into an inoperative position.

2. In a dobby, the combination with two pattern cylinders having a rotary movement in a fixed plane, and a pattern chain on cach cylinder, of two sets of indicating levers, one set for each pattern cylinder, and means for moving the indicating levers of each set 1 into their inoperative position. l

3. In a dobby, the combination with two pattern cylinders having a rotary movement in a fixed plane, and a pattern chain on each cylinder, and means to rotate said pattern cylinders, of two sets of indicating levers, one set for each cylinder, each set of indicating levers actuating the hooks to the lifter bars, through the same operating wires, and means for moving the indicating levers of each set into their inoperative position.l y

4. In a dobby, the combination with two pattern cylinders having a rotary movement in a fixed plane, and a pattern chain on each cylinder, and means to successively actuate said pattern cylinders, of two sets of indicating levers, one set for each cylinder, each set of indicating levers actuating the hooks to the lifter bars, through the same operating wires, and one device for moving the indicating levers of each set into their inoperative position.

5. In a dobby, the combination with two pattern cylinders, one cylinder having longitudinal recesses therein for the pattern bars of a pattern chain, and said pattern chain, and a support and guide for a loop of the chain, adapted to hold the highest bar of the loop within a longitudinal groove in the pattern cylinder, to cause a positive movement of the loop of the chain with the main portion of the chain as the cylinder rotates, of two sets of pattern indicating levers, one set for each pattern cylinder, and means for moving each set of levers into an inoperative position.

6. In a dobby, the combination with two pattern cylinders, one cylinder having longitudinal recesses therein for the pattern bars of a pattern chain, and said pattern chain, and a stationary support and guide for a loop of the chain, adapted to hold the highest bar of the loop within a longitudinal groove in the pattern cylinder, to cause a positive movement of the loop of the chain with the main portion of the chain, as the cylinder rotates, of two sets of pattern indicating levers, one lset for each pattern cylinder, and means for moving each set of levers into an inoperative position.

7. In a dobby, the combination with two pattern surfaces having a rotary movement in a ixed plane, and a worm drive for communicating rotary movement to said pattern surfaces, of two sets of pattern indicating levers, one set for each pattern surface, and means for moving each set of levers into an inoperative position.

8. In a dobby, the combination with two patternsurfaces, having a rotary movement in a. lixed plane, and means for communicating a rotary movement to said pattern surfaces, of twosets of pattern indicating levers, one set for each pattern surface, and means for moving each set of levers into an inoperative position.

9. In a dobby, the combination with two pattern cylinders, having a rotary movement in a fixed plane, and means for communieating a rotary movement to said pattern cylinders, of two sets of pattern indicating levers, one set for each pattern surface, and means for moving each set of levers into an inoperative position, said means comprising a rocking rod extending under said levers, and connection to a rocking lever, and said lever controlled as to its motion by a pattern mechanism.

10. In a dobby, the combination with two pattern cylinders having a rotary movement in a fixed plane, aiid means for controlling the rotary movement of said pattern cylinders from a pattern surface, of two sets of pattern indicating levers, one set for each pattern surface, and means for moving each set of levers into an inoperative position.

1l. In a dobby, the combination with two pattern cylinders, having a rotary movement in a fixed plane, and means for communicating a rotary movement to said pattern cylinders, and means to cause one pattern cylinder or the other to rotate at a predetermined time, and for a predetermined interval, according to the indications of a pattern surface, of two setsof pattern indicating levers, one set for each pattern surface, and means for moving each set of levers into an inoperative position. l

ALBERT A. GORDON, JR.

Witnesses:

JOHN C. DEWEY, M. Haas. 

